Use coverage only on the source, docs and tests dir

Remove .coveragerc file
Make sure the unit tests are run on the development version, not the one installed in site-packages

Author: iMichka

.coveragerc

@@ -22,7 +22,7 @@ script:
   # Install pygccxml
   - python setup.py install
   # Run the tests with coverage
-  - coverage run unittests/test_all.py
+  - coverage run --source=pygccxml,docs,unittests unittests/test_all.py
 
 after_success:
   # Send coverage result to https://coveralls.io/r/gccxml/pygccxml

.travis.yml

@@ -27,6 +27,9 @@
 gccxml_version = '__GCCXML_09__'
 
 sys.path.insert(0, os.path.join(os.curdir, '..'))
+# The tests are run on the parent pygccxml directory, not the one
+# in site-packages. Insert the directory's path.
+sys.path.insert(0, "../pygccxml")
 import pygccxml
 import pygccxml.declarations
 import pygccxml.parser